A drunken typo of the expression "I'm schmacked", which is referring to being very fucked up on alcohol or xanax. When at a party, one will shout "Vim schmacked", or "I'm vim schmacked", to let the others know how fucked up he/she is. "Vim" is often used as a stand alone term for drinking and becoming intoxicated, and can be alternated into terms such as "Vimmy", or "Vimmer".

Shaan: Wanna come to the party on my boat tonight? I'm gonna be vim schmacked.

Rammer: No thanks man, my brother is having a banger in his garage, my levels of vim will be through the roof.
Shaan: Real shit?